Originally Posted by
mahasamatman
People book the Economy awards, so they disappear from inventory. Fewer people book the Business awards because they're double the cost for no real benefit intra-Europe. It's all supply and demand.
It really depends on the mileage system's requirements.
I noticed for MAD-BRU, with Alaska (Iberia), business was 15,000, just double the economy 7,500.
United (Brussels Airline) was almost 6 times the economy requirement (45,000 vs 8,000).